短語(yǔ)詞組短語(yǔ)displacement oil pump 活塞式油泵;排量油泵;排代油泵variable displacement fuel pump 變量燃料泵variable displacement piston pump 可變排量的柱塞泵Large displacement gear pump 大排量齒輪泵displacement of pump 泵排量positive displacement solenoid pump 容積式電磁泵variable displacement hydraulic pump 可變排量的液壓泵;柱塞變量泵fixed displacement gear pump 固定排量齒輪泵 返回 displacement pump